And God will surely accomplish His purpose through the preaching of His Word. Tell the sinner that Jesus preserves His sheep so that no man can ever snatch them from His hand. Tell the sinner that whosoever believes shall surely and eternally be saved. He speaks to the laboring and heavy laden. These are deeply conscious of their burden of sin and guilt.
Wicked man refuses to recognize and confess the burden of sin.
But Christ calls powerfully those who are brought to a consciousness of their sin to come to Him for rest. These do surely come and obtain the rest they desire. Here again, the thirsting one is addressed. But such an one confesses that he has no money to buy. He cannot merit or earn the blessings of salvation.