Observable Facts That All Agrees

Effects (果)
Observable facts that all agrees:
Environment
1. Everything decays;
2. All living things die.
Men
1. No one is perfect;
2. All men suffer and die.

Cause (因)
But why is this happening? This is where the major disagreements are:
Why is our environment dying and decaying?
Why are men imperfect, suffering and dying?
Here are two explanations, one from the Bible and the other from Buddha.
Bible's explanation:
Imperfection environment and men are caused by sin. Sin is caused by man's disobedience.
Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned: (Romans 5:12 KJV)
Buddha's explanation:
Imperfection in environment is accepted as it is, i.e. it is natural to have decay and death.
Imperfection in men is caused by desire and ignorance.

Salvation
Bible's solution:
Salvation provided by God through the death of His Son who died for our sins.
Buddha's solution:
Self-effort through the eight-fold path.

Final Destination
Bible:
Heaven or Hell
Buddhism:
Nirvana

Effect
Christianity
Men are saved by God's effort. There is nothing to boast. Humility is needed. Men must acknowlege his sinfulness and incapability.
For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast. (Ephesians 2:8 KJV)
Buddhism
Self effort. Salvation is deserved, a right, an entitlement. No Buddhist framed their salvation as a form of pride. However, when they argued with Christians, this pride is revealed.
佛法的目的要使人人成佛，但其他宗教絕不許可人能成上帝…………其他宗教叫人如何去做房客而不是叫人去做房東，房東只有一個上帝，別人永遠是沒有份的。佛不以自己成佛為滿足，他還希望人人成佛