Integrity in all you do has a foundation of trust in the Lord. The passage below is C.H. Spurgeon commenting on Psalm 62:8. It is rich and practical truth.

“Trust in Him at all times.” – Psalm 62:8

Let me commend to you a life of trust in God in temporal things. Trusting in God, you will not be compelled to mourn because you have used sinful means to grow rich. Serve God with integrity, and if you achieve no success, at least no sin will lie upon your conscience. Trusting God, you will not be guilty of self-contradiction. He who trust in his ship sails this way today and that way the next, like a vessel tossed about by the fickled wind. But he that trusts in the Lord is like a vessel propelled by steam; she cuts through the waves, defies the wind, and makes one straightforward track to her destined haven.

So be one of those saints with living principles within. Never bow to the varying customs of worldly wisdom. Walk in your path of integrity within steadfast steps and show that you are invincibly strong in the strength which confidence in God alone confer. Thus you will be delivered from burdensome cares and will not be troubled by evil tidings, but your heart will be fixed, trusting in the Lord. How pleasant to float along the stream of providence! There is no more blessed way of living than a life of dependence upon a covenant-keeping God. We have no care, for He careth for us; we have no troubles, because we cast our burdens upon the Lord.

– C. H. Spurgeon