Our first postulate is that ...

Our first postulate is that because God is God, He does as He pleases, only as He pleases, always as He pleases; that His great concern is the accomplishment of His own pleasure and the promotion of His own glory that He is the Supreme Being, and therefore Sovereign of the universe.
 Arthur W. Pink

Quotes from the same author

If any occupation or association is found to hinder our communion with God or our enjoyment of spiritual things, then it must be abandoned. Anything in my habits or ways which mars happy fellowship with the brethren or robs me of power in service, is to be unsparingly judged and made an end of-'burned.' Whatever I cannot do for God's glory must be avoided.
 Arthur W. Pink
An ineffably holy God, who has the utmost abhorrence of sin, was never invented by any of Adam's descendents.
 Arthur W. Pink
Satan is ever seeking to inject that poison into our hearts to distrust God's goodness - especially in connection with his commandments. That is what really lies behind all evil, lusting and disobedience. A discontent with our position and portion, a craving from something which God has wisely held from us. Reject any suggestion that God is unduly severe with you. Resist with the utmost abhorrence anything that causes you to doubt God's love and his loving-kindness toward you. Allow nothing to make you question the Father's love for his child.
 Arthur W. Pink
Our Lord Jesus Christ added nothing to God in His essential being and glory, either by what He did or suffered. True, blessedly and gloriously true, He manifested the glory of God to us, but He added nought to God.
 Arthur W. Pink
It is not the absence of sin but the grieving over it which distinguishes the child of God from empty professors.
 Arthur W. Pink