In the end, your energy - your perception and your ability - is all you have. Raise your energy and there's your guarantee. Discipline yourself and don't let little emotional upsets become large theatrical self-indulgences which destroy your stability and last ages. Change all the things you can change, accept most of the ones you can't, and walk away from the rest.
Change you opinions, control the ego, and the light of spirit flows naturally from within your serenity. The more level and equitable you life becomes, the more the inner light of God shines through your mind - bypassing the ego and showing you a beauty and perception of life that most never even seek, let alone attain.