Matthew 5:5 the meek
Meekness is the opposite of being out of control. It is not weakness, but supreme self-control empowered by the Spirit as stated in Galatians 5:23... "gentleness, self-control. Against such there is no law." Gentleness... better translated "meekness" is a humble and gentle attitude that is patiently submissive in every offense, while having no desire for revenge or retribution. In the New Testament, it is used to describe 3 attitudes: submission to the will of God (Collosian 3:12), teachability (James 1:5,6), and consideration of others (Ephesians 4:2).
Self-control refers to restraining passions and appetites as instructed in 2 Peters 1:5,6... "But also for this very reason, giving all diligence, add to your faith virtue, to virtue knowledge, to knowledge self-control, to self-control perseverance, to perseverance godliness, to godliness brotherly kindness, and to brotherly kindess love.