1) "By pureness," (en agnoteti) "in a state of purity," chaste behavior, commending ourselves; purity of intent and thought, life, speech, motive, and chastity, 1 Thessalonians 2:10; James 3:17; 1 John 3:3.
2) "By knowledge," (en gnosei) "In knowledge," commending ourselves; by right views of God, Ephesians 3:4; Perhaps by the gift of knowledge that then continued, 1 Corinthians 12:8.
3) "By longsuffering," (en makrothumia) In longsuffering," forbearance, commending ourselves; Even under ill-treatment, God’s servants must be long-suffering, 2 Timothy 3:10; 2 Timothy 4:2.
4) "By kindness " (en chrestoteti) "In kindness," commending ourselves: This is a divine attribute, to be reflected in and through ministers and servants of Christ, a Christian virtue, Romans 2:4; Romans 11:22; Ephesians 2:7; 2 Peter 1:7.
KINDNESS
If there be one virtue which most commends Christians, it is that of kindness: it is to love the people of God, to love the Church, to love poor sinners, to love all. But how many have we in our churches of crabtree Christians, who have mixed such a vast amount of vinegar, and such a tremendous quantity of gall in their constitutions, that they can scarcely speak one good word to you. They imagine it impossible to defend religion except by passionate ablutions, they cannot speak for their dishonored Master without being angry with their opponent; and if anything is awry, whether it be in the house, the church, or anywhere else, they conceive it to be their duty to set their faces like flint, and to defy everybody. They are like isolated icebergs, no one cares to go near them. Imitate Christ in your loving spirits; speak kindly, act kindly, and think kindly, that men may say of you," He has been with Jesus."
-C. H. Spurgeon
5) "By the Holy Ghost," (en pneumati hagio) "in a holy (sanctified) Spirit," or disposition, commending ourselves; 1 Corinthians 6:19-20; Galatians 5:16; Galatians 5:25.
6) "By love unfeigned," (en agape anupokrito) "in love unfeigned (unpretentious)," without pretence, commending ourselves. This refers to love for men, without pretence, or shame, or hypocrisy; 2 Corinthians 12:15; John 13:34-35; 1 John 3:14; 1 John 3:17; 1 John 4:7.