And you shall love the Lord your God with all your heart, with all your soul, with all your mind, and with all your strength. This is the First Commandment. Mark 12:30

AND TO DO THIS, ONE MUST:

And when He had called the people to Himself, with His disciples also, He said to them, “Whoever desires to come after Me, let him deny himself, and take up his cross, and follow Me. For whoever desires to save his life will lose it, but whoever loses his life for My sake and the gospel’s will save it. For what will it profit a man if he gains the whole world, and loses his own soul? Mark 8:34-36