Thomas Watson (d. 1686) is one of my favorite Puritan authors. He wrote clearly, concisely, and biblically. Here’s one great example from his discussion of faith and works in The Beatitudes.
Julian [a Roman emperor who renounced Christianity when he became emperor) upbraided the Christians that they were Solifidians, and the Church of Rome lays upon us this aspersion, that we are against good works. Indeed we plead not for the merit of them but we are for the use of them. ‘Let ours also learn to maintain good works for necessary uses’ (Titus 3:14). We preach that they are needful both as they are enforced by the precept and as they are needful for the general good of men.”
“…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.’ (Titus 3:8). …Faith alone justifies but justifying faith is not alone. You may as well separate weight from lead or heat from fire as works from faith. Good works, though they are not the causes of salvation, yet they are evidences. Though they are not the foundation yet they are the superstructure. Faith must not be built upon works, but works must be built upon faith. …Faith is the grace which marries Christ and good works are the children which faith bears.”
Similarly, the Westminster Confession says (16.2):
“These good works, done in obedience to God’s commandments, are the fruits and evidences of a true and lively faith.”
(The above quote by Thomas Watson is found in The Beatitudes, p. 155-156.)