Section 4 - God's providence does not excuse us from due prudence
If God provides earthly means to preserve and protect ourselves, we should use them.
God provides and orders events using means, which He also determines.
Section 5 - God's providence does not exculpate our wickedness
Some abuse this doctrine, saying the wicked shouldn't be punished when they sin, for they did what God ordained to happen. But they are not doing God's will.
They can't blame God for their sin, or call their sin "justice" just because it happened.
A corpse rots in the sun, but we don't blame the sun for the stench.
[Such vivid illustrations! Calvin's own!]