John Calvin Commentary Psalms 18:22

"For all his ordinances were before me, And I put not away his statutes from me." — Psalms 18:22 (ASV)

For all his judgments were before me. He now shows how he came to possess that unbending rectitude of character, by which he was enabled to act uprightly amid so many and so grievous temptations, namely, because he always applied his mind to the study of the law of God.

As Satan is daily making new assaults upon us, it is necessary for us to take up arms, and it is meditation upon the Divine Law which furnishes us with armor to resist. Whoever, therefore, desires to persevere in uprightness and integrity of life, let them learn to exercise themselves daily in the study of the word of God; for, whenever a person despises or neglects instruction, they easily fall into carelessness and stupidity, and all fear of God vanishes from their mind.

I do not intend here to make any subtle distinction between these two words, judgments and ordinances. If, however, any person is inclined to make a distinction between them, the best distinction is to refer judgments to the second table of the law, and ordinances, or statutes, which in Hebrew are called חוכות, chukoth, to the duties of piety and the exercises immediately connected with the worship of God.