The Word for today is found in Genesis 22:2-3 and 16-17
2And he said, Take now thy son, thine only son Isaac, whom thou lovest, and get thee into the land of Moriah; and offer him there for a burnt offering upon one of the mountains which I will tell thee of. 3And Abraham rose up early in the morning, and saddled his ass, and took two of his young men with him, and Isaac his son, and clave the wood for the burnt offering, and rose up, and went unto the place of which God had told him. 16And said, By myself have I sworn, saith the LORD, for because thou hast done this thing, and hast not withheld thy son, thine only son: 17That in blessing I will bless thee, and in multiplying I will multiply thy seed as the stars of the heaven, and as the sand which is upon the sea shore; and thy seed shall possess the gate of his enemies; (KJV)
2 Then God said, “Take your son, your only son, whom you love—Isaac—and go to the region of Moriah. Sacrifice him there as a burnt offering on a mountain I will show you.” 3 Early the next morning Abraham got up and loaded his donkey. He took with him two of his servants and his son Isaac. When he had cut enough wood for the burnt offering, he set out for the place God had told him about.16 and said, “I swear by myself, declares the LORD, that because you have done this and have not withheld your son, your only son, 17 I will surely bless you and make your descendants as numerous as the stars in the sky and as the sand on the seashore. Your descendants will take possession of the cities of their enemies, (NIV)
God does not do human sacrifice; what he wanted was Abraham’s heart.
God had a covenant with Abraham which says that all that I have is yours and all that you have is mine.
God later offered his only Son on the cross for our sins, and he wanted to see if Abraham would be willing to fulfill his part of the covenant. God will sometimes ask us to do things so he can see where our real heart is.
Are you holding anything back from God that you need to give to him? It will cause the blessing that God has planned for your life not to come to pass.
Yes, God will and has blessed us despite our lack of willingness to give our all, but you are still staying the hand of God from giving you his best.