The most important one is this; 'The Lord our God is the only Lord. Love your God with all your heart, soul, mind, and strength.' The second most important commandment is this; 'Love your neighbor as yourself'
Well done, Teacher! It is true, as you say, that only the Lord is God and that there is no other god but he. And man must love God with all his heart, mind, and strength; and he must love his neighbor as himself. It is more important to obey these two commandments than to offer on the alter animals and other sacrifices