"This is a faithful saying, and these things I will that thou affirm constantly, that they which have believed in God might be careful to maintain good works. These things are good and profitable unto men." (Titus 3:8)
A closer look:
faithful - trustworthy, sure, or true
affirm - thoroughly confirm by word through preaching or speaking
careful - to exercise thought
maintain - practice
Good works stem from good doctrine. Daily reading and studying His Word, listening to the preaching of His Word at church, and sharing Bible principles and verses in conversation exposes us as believers to good doctrine. When sound doctrine is heeded, good works are the end result.