Regret fills your heart, only if you do not give your best to accomplish something.
Disappointments in love, even betrayals and losses, serve the soul at the very moment they seem in life to be tragedies. The soul is partly in time and partly in eternity. We might remember the part that resides in eternity when we feel despair over the part that is in life.
Freddie experienced the sort of abysmal soul-sadness which afflicts one of Tolstoy's Russian peasants when, after putting in a heavy day's work strangling his father, beating his wife, and dropping the baby into the city's reservoir, he turns to the cupboards, only to find the vodka bottle empty.
The person you hurt the most in this world was the person that brought you into it.
No matter what happens to you, you do not have to be bitter. You deserve to be happy.