"Excessive care about worldly matters is characteristic of an unbelieving and fainthearted person, and woe to us, if, in taking care of ourselves, we do not use as our foundation our faith in God, who cares for us!
If we do not attribute visible blessings to Him, which we use in this life, then how can we expect those blessings from Him which are promised in the future?
We will not be of such little faith.
By the words of our Savior, it is better first to seek the Kingdom of God, for the rest shall be added unto us (cf. Matthew 6:33)." -- St. Seraphim of Sarov
"When mind and heart are united in prayer and the soul is wholly concentrated in a single desire for God, then the heart grows warm and the light of Christ begins to shine and fills the inward man with peace and joy. We should thank the Lord for everything and give ourselves up to His will; we should also offer Him all our thoughts and words, and strive to make everything serve only His good pleasure."
-- St. Seraphim of Sarov