Life is inherently challenging, but if we quit struggling and accept that life is about suffering, prepare ourselves each day through prayer and mindfulness, and then let go and let God, we will know peace.
Matthew 17:13-14
Enter through the narrow gate; for the gate is wide and the road is easy that leads to destruction, and there are many who take it. For the gate is narrow and the road is hard that leads to life, and there are few who find it.