In the course of the time of Abraham (a foretaste of what is to come) God tested Abraham to see if he would be prepared to give up his only son just as God intended with “Jesus”. Abraham’s full trust in God out-weighted logic. On the other hand, if he did murder Isaac (his only son), his work would have been useless. This is due to the fact Abraham and all his descendants such as us, are offsprings Eve (a sinful generation).
“Hebrews 10:12-14” shows us that it is only by the sacrifice, blood, death, and resurrection of Jesus that we are fully saved! In a further verse in the bible we see that, Jesus was conceived in the womb of Mary by yhe Holy Spirit. Hence Jesus is 100% God as he is Man. It is only by His pure undefiled blood are we saved and created great prior to God.