Another characteristic which should be prevalent in the believer’s life is that of self-control. This means that the believer is to be temperate in all situations. It covers areas such as: anger, lust, eating and drinking, or any area which could severely affect our testimony and/or lifestyle if allowed to continue unabated.

Your gentleness should be evident
(Phil 4:5 KJV) Let your moderation be known unto all men. The Lord is at hand.
The word “moderation” in this verse carries with it the meaning of gentleness. Some have tried to horribly misuse this verse to try and prove their “everything in moderation” theory, especially when they want to have a beer or partake in some other worldly activity.
Self-Control is one of the ingredients for kindness
(2 Pet 1:6 KJV) And to knowledge temperance; and to temperance patience; and to patience godliness;
Self-Control is a requirement for Church leadership
(1 Tim 3:3 KJV) Not given to wine, no striker, not greedy of filthy lucre; but patient, not a brawler, not covetous;
(Titus 1:7 KJV) For a bishop must be blameless, as the steward of God; not selfwilled, not soon angry, not given to wine, no striker, not given to filthy lucre;
Our tongue must be controlled
(James 1:26 KJV) If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain.
Self-Indulgence must be controlled
(Eccl 6:7 KJV) All the labour of man is for his mouth, and yet the appetite is not filled.
Worldly pleasures must be controlled
(Luke 8:14 KJV) And that which fell among thorns are they, which, when they have heard, go forth, and are choked with cares and riches and pleasures of this life, and bring no fruit to perfection.
Envy must be controlled
(Psa 37:1 KJV) Fret not thyself because of evildoers, neither be thou envious against the workers of iniquity.
Selfishness must be controlled
(1 John 3:17 KJV) But whoso hath this world's good, and seeth his brother have need, and shutteth up his bowels of compassion from him, how dwelleth the love of God in him?
Self-Will must be controlled
(2 Pet 2:10 KJV) But chiefly them that walk after the flesh in the lust of uncleanness, and despise government. Presumptuous are they, selfwilled, they are not afraid to speak evil of dignities.
Stubbornness must be controlled
(Zec 7:11 KJV) But they refused to hearken, and pulled away the shoulder, and stopped their ears, that they should not hear.
Anger must be controlled
(Prov 15:18 KJV) A wrathful man stirreth up strife: but he that is slow to anger appeaseth strife.
(Prov 16:32 KJV) He that is slow to anger is better than the mighty; and he that ruleth his spirit than he that taketh a city.
Grudges must be controlled
(Mat 5:23-24 KJV) Therefore if thou bring thy gift to the altar, and there rememberest that thy brother hath ought against thee; {24} Leave there thy gift before the altar, and go thy way; first be reconciled to thy brother, and then come and offer thy gift.
Our attitudes must be controlled
(Rom 12:3 KJV) For I say, through the grace given unto me, to every man that is among you, not to think of himself more highly than he ought to think; but to think soberly, according as God hath dealt to every man the measure of faith.
(Phil 2:4 KJV) Look not every man on his own things, but every man also on the things of others.