The (fully acquainted) is the one who knows all details, nothing is hidden from him. So, let us not deceive ourselves and think that we can hide anything of the Creator (swt). Allah (swt) is knowledgeable of the secrets and the deeds, knows what souls hide and reveal and He (swt) is fully aware of the intentions whether good or evil. Such as, Allah (swt) is knowledgeable of whom who shows his charity or hide it, who builds a mosque, wo does good deeds to others. This matter makes hearts shiver in fear and terror. As the man can lie to humans, evades his duty, cheats, devours public money and be bribed ….etc, but at there , there is no way for that.