" The permanence of God’s character guarantees the fulfillment of His promises: “For the mountains shall depart, and the hills be removed; but My kindness shall not depart from thee, neither shall the covenant of My peace be removed, saith the LORD that hath mercy on thee” (Isa 54:10). Herein is encouragement to prayer . What comfort would it be to pray to a god that, like the chameleon, changed color every moment? Who would put up a petition to an earthly prince that was so mutable as to grant a petition one day, and deny it another? "

― Arthur W. Pink , The Attributes of God