Matthew 6:1-8, 16-18 Secrets to keep are our secret world of righteousness (giving, fasting, praying). Our motivation must be pure and give glory to God, not ourselves.
Ask yourself: Who will be glorified by what I'm doing?
Secrets not to keep include temptation and sin--A secret world of concealment of sin. Psalm 32: 1-5 Don't care more about your repuration than righteousness. Read Psalm 51 together with Psalm 32. Wrestle to keep your keart soft, be honest, vulnerable and radically open with your life.
God sees everything done in secret.
Watch the service in full
here (the sermon starts at 41 mins).