Feelings of bitterness and dissatisfaction feed upon themselves and give place to thoughts and acts of unkindness, criticism, and eventually even hatred. Criticism is often motivated by a desire to rationalize one's own shortcomings and to justify termination of sacred marriage covenants.
If you choose to concentrate on the dark side, this is what you will see.
Chose to converse with your Father in Heaven often. Make time every day to share your thoughts and feelings with Him.
Sadness, disappointment, and severe challenge are events in life, not life itself.