For it is by grace that you have been saved, through faith – and this not from yourselves, it is the gift of God – not by works so that no one can boast. For we are God’s workmanship created in Christ Jesus to do good works which God prepared in advance for us to do.
Be wise in the way you act toward outsiders; make the most of every opportunity. Let your conversation be always full of grace, seasoned with salt, so that you may know how to answer everyone.
There are no random acts of kindness, only intentional acts given the opportunity to happen. We have thought about kindnesses we can do. We have committed ourselves to acting in ways that are kind and beneficial. We have prayed for an opportunity to be kind. Then the opportunity presents itself and bingo! We act with kindness. Nothing random about that! This is true not just in deeds, but in words as well. More than trying to avoid poor speech, we are urged to use our speech to bless and help others to come to know Christ.
But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin. If we claim to be without sin, we deceive ourselves and
the truth is not in us. If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness.
1 John 1:7-9
Therefore, my dear brothers, stand firm. Let nothing move you. Always give fully to the work of the Lord because you know that your labor in the Lord is not in vain.
1 Corinthians 15:58