but day by day, as long as "Today" shall last, continue to encourage one another, so that not one of you may be hardened by sin's deceiving ways,

He again fixes a definite day, saying long afterward through David, as has been quoted: "If you but hear His voice, you must not harden your hearts."

For although you ought to be teachers of others because you have been Christians so long, you actually need someone to teach you over and over again the very elements of the truths that God has given us, and you have gotten into such a state that you are in constant need of milk instead of solid food.