Examples:

• Now I accept the supernatural as a fact of life.
• The global consumer is now a fact of life.
• But disappointment is a fact of life, I suppose.
• It's unfortunate, but it's just a fact of life.
• Emotional hurts and disappointments are a fact of life.
• Nicks while shaving are a fact of life.
• It's a fact of life and a cornerstone of my profession.
• It's a fact of life I've come to accept.
• They're a fact of life, like the corpuscular theory of light.
• Unfortunately it's a fact of life in this post-industrial age.