It comprises instruction relating to the significance and sequence of past dispensations, the importance of the present as the greatest and grandest era of human history. This course of instruction includes a recital of the most prominent events of the creative period, the condition of our first parents in the Garden of Eden, their disobedience and consequent expulsion from that blissful abode, their condition in the lone and dreary world when doomed to live by labor and sweat, the plan of redemption by which the great transgression may be atoned, the period of the great apostasy, the restoration of the gospel with all its ancient powers and privileges, the absolute and indispensable condition of personal purity and devotion to the right in present life, and a strict compliance with gospel requirements.
The ordinances of the endowment embody certain obligations on the part of the individual, such as covenant and promise to observe the law of strict virtue and chastity, to be charitable, benevolent, tolerant and pure; to devote both talent and material means to the spread of truth and the uplifting of the race; to maintain devotion to the cause of truth; and to seek in every way to contribute to the great preparation that the earth may be made ready to receive her King,—the Lord Jesus Christ. With the taking of each covenant and the assuming of each obligation, a promised blessing is pronounced, contingent upon the faithful observation of the conditions.
The House of the Lord [Salt Lake City: Deseret Book, 1968], pp. 83, 84
Let me give you a definition in brief. Your endowment is to receive all those ordinances in the house of the lord which are necessary for you after you have departed this life, to enable you to walk back to the presence of the Father, passing the angels who stand as sentinels, being enabled to give them the key words, the signs and tokens pertaining to the holy priesthood and gain your eternal exaltation in spite of earth or hell.
[Discourses of Brigham Young (Salt Lake City: Deseret Book Co., 1941), p. 416]
What must we do? The Savior tells us to do five things, and the first is very easy: "Therefore,  go ye unto your homes, and  ponder upon the things which I have said, and  ask of the Father, in my name, that ye may understand, and  prepare your minds for the morrow, and  I come unto you again." (3 Nephi 17:3.) If we do not understand all we see and hear in the temple, we must not be fearful, guilty, or apathetic. We must go home, ponder, pray, prepare, and then return.
The endowment you are so anxious about, you cannot comprehend now, nor could Gabriel explain it to the understanding of your dark minds; but strive to be prepared in your hearts, be faithful in all things, that when we meet in the solemn assembly...we must be clean every whit. Let us be faithful and silent, brethren, and if God gives you a manifestation, keep it to yourselves; be watchful and prayerful, and you shall have a prelude of those joys that God will pour out on that day. Do not watch for iniquity in each other, if you do you will not get an endowment, for God will not bestow it on such. But if we are faithful, and live by every word that proceeds forth from the mouth of God, I will venture to prophesy that we shall get a blessing that will be worth remembering
The true teaching in the temple is not group instruction. Each soul is invited to have his or her own personal tutor, that of the Spirit, who will tailor the symbols to specific needs and levels of maturity while inviting the active participation of each individual in the learning process.
"When you return [to the temple], come with an open, seeking, contrite heart, and allow the Spirit to teach you by revelation what the symbols can mean to you."
"It is evident that the work relating to temples bothers the adversary the most."
"Temple mirrors of eternity remind us that each human being has “divine nature and destiny”; that “sacred ordinances and covenants available in holy temples make it possible for individuals to return to the presence of God and for families to be united eternally”; and that, growing together in love and faithfulness, we can give children roots and wings."
The ability to qualify for, receive, and act on personal revelation is the single most important skill that can be acquired in this life. Qualifying for the Lord’s Spirit begins with a desire for that Spirit and implies a certain degree of worthiness. Keeping the commandments, repenting, and renewing covenants made at baptism lead to the blessing of always having the Lord’s Spirit with us. Making and keeping temple covenants also adds spiritual strength and power to a woman’s life. Many answers to difficult questions are found by reading the scriptures because the scriptures are an aid to revelation. Insight found in scripture accumulates over time, so it is important to spend some time in the scriptures every day. Daily prayer is also essential to having the Lord’s Spirit with us. Those who earnestly seek help through prayer and scripture study often have a paper and pencil nearby to write questions and record impressions and ideas.
Don’t be afraid to walk out of a movie, turn off a television set, or change a radio station if what’s being presented does not meet your Heavenly Father’s standards. In short, if you have any question about whether a particular movie, book, or other form of entertainment is appropriate, don’t see it, don’t read it, don’t participate.
The Apostle Paul declared: “Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you? . . . The temple of God is holy, which temple ye are.” Brethren, it is our responsibility to keep our temples clean and pure.