J.i. Packer said this quote

Optimism hopes for the best without any guarantee of its arriving and is often no more than whistling in the dark. Christian hope, by contrast, is faith looking ahead to the fulfillment of the promises of God, as when the Anglican burial service inters the corpse 'in sure and certain hope of the Resurrection to eternal life, through our Lord Jesus Christ.' Optimism is a wish without warrant; Christian hope is a certainty, guaranteed by God himself. Optimism reflects ignorance as to whether good things will ever actually come. Christian hope expresses knowledge that every day of his life, and every moment beyond it, the believer can say with truth, on the basis of God's own commitment, that the best is yet to come.

~ J.i. Packer

What is less often noticed is that it is precisely the kind of moral instruction that parents are constantly trying to give their children — concrete, imaginative, teaching general principles from particular instances, and seeking all the time to bring the children to appreciate and share the parent's own attitudes and view of life… The all-embracing principles of conduct

~ J.i. Packer

Only when it is seen that what decides each individual's destiny is whether or not God decides to save him from his sins, and that this is a decision that God need not make in any individual case, can one begin to grasp the biblical view of grace.

~ J.i. Packer

Confidence that one's impressions are God-given is no guarantee that this is really so, even when they persist and grow stronger through long seasons of prayer. Bible-based wisdom must judge them.

~ J.i. Packer