"如果我们在环境似乎不利于我们的时候不能相信上帝，那么我们根本就不相信他。"

Simplified Meaning:

The quote means that true belief or faith in something should be strong even when things are tough. Imagine a friend who always says they trust you, but when you face a difficult situation, they doubt your abilities or intentions. This would make you question if they really trust you at all. In the same way, if someone says they have faith in God, but only when life is going well, their faith isn't complete or strong. It's like saying you only trust your car when the weather is good, but not when it rains. Real trust and faith mean believing, even when situations seem unfavorable. If someone believes in God, they should trust Him in both good and bad times, which shows genuine faith. To apply this in life, one should try to maintain trust and belief in the people or things they hold dear, especially when things aren't going as planned.