Charles H. Spurgeon on Psalms 16:8

Even as a column or pillar is sometimes on thy right hand, and sometimes on thy left hand, because thou dost change thy standing, sitting or walking, for it is unmovable and keepeth one place; so God is sometimes favourable and bountiful unto thee, and sometimes seemeth to be wroth and angry with thee, because thou dost fall from virtue to vice, from obedience and humility to pride and presumption; for in the Lord there is no change, no, not so much as any shadow of change. He is immutable, always one and everlasting. If thou wilt bend thyself to obedience, and to a virtuous and godly life, thou shalt ever have him a strong rock, whereupon thou mayst boldly build a castle and tower of defence. He will be unto thee a mighty pillar, bearing up heaven and earth, whereto thou mayst lean and not be deceived, wherein thou mayst trust and not be disappointed. He will ever be at thy right hand, that thou shalt not fall. He will take thy part, and will mightily defend thee against all enemies of thy body and of thy soul; but if thou wilt shake hands with virtue, and bid it adieu and farewell, and, forsaking the ways of God, wilt live as thou list, and follow thy own corruption, and make no conscience of aught thou doest, defiling and blemishing thyself with all manner of sin and iniquity, then be sure the Lord will appear unto thee in his fury and indignation. From his justice and judgments none shall ever be able to deliver thee. —Robert Cawdray.