Explain Total Depravity

Total depravity refers to the extent of the corruption of man. The corruption is total. It has affected his spirit, soul and body. Moreover, it has also affected his mind, desires, feelings, emotions and will. No part of man has escaped the corruption of sin.

Total depravity does not mean that depraved man has and is going to express his depravity to absolute  and consummate level of wickedness all the time, anywhere. No, there are factors that restrain the full expression of his depravity. A totally depraved man is capable of committing every kind of sin but it does not necessarily mean that he has actually committed all of it outwardly. We are all capable of murdering our own parents but not every single depraved person has done so. Depraved man is way worse than all the things he has ever done so far.

A depraved person however, if given enough time, apart from the grace of God, will express his corruption to the utter degree, by and by. Many will have probably raped their own mothers at age 150, who knows.