One of my favorite Scripture quotes is Matthew 6:26: "Behold the birds of the air, for they neither sow, nor do they reap, nor gather into barns and your heavenly Father feedeth them. Are not you of much more value than they?" This passage gives such comfort that we are so valued and loved by God and He will always take care of everything.
I also like that this chapter of Scripture reminds us to focus on one day at at time and not to worry about the future. It's so easy to always be thinking about tomorrow, whether it is simple planning or more serious planning and to get caught up in wondering what our future holds. If we find our thoughts constantly dwelling on a part of our lives that hasn't come yet, we will never really live each day.
God is in the present moment. I love how Mother Angelica talked so much about this concept. The present moment is all we have, the moment before is gone and the moment ahead has not yet come. We should focus on truly living by enjoying life in the little moments and not taking them for granted.