integrity is fundamental to good character
Integrity (the willingness and ability to live by our beliefs and commitments) is one of the foundation stones of good character, and without good character one cannot hope to enjoy the presence of God here or in the eternities.
Integrity is a state or quality of being complete, undivided, or unbroken. It is wholeness and unimpaired. It is purity and moral soundness. It is unadulterated genuineness and deep sincerity. It is courage, a human virtue of incalculable value. It is honesty, uprightness, and righteousness. Take these away and there is left but an empty shell.
Integrity in man should bring inner peace, sureness of purpose, and security in action. Lack of it brings the reverse: disunity, fear, sorrow, unsureness.
It would be well if all of us would take frequent inventory to see if hidden away under the rugs and in the corners of our lives there might be some vestige of hypocrisy and ugliness or error. Or could there be hidden under the blankets of personal excuse and rationalization some small eccentricities and dishonesties? Are there any cobwebs in ceilings and corners which we think will not be noticed? Are we trying to cover up the small pettinesses and the small gratifications we secretly allow ourselves—rationalizing the while that they are insignificant and inconsequential? Are there areas in our thoughts and actions and attitudes which we would like to hide from those we respect most?
President Spencer W. Kimball, "Teachings of Presidents of the Church, Spencer W. Kimball" page 126