You can never fulfil those commandments. And if you are honest, they lead not to spiritual pride because you've kept them, but to humility, because you realize you fall continually short of them, and your salvation depends, not upon keeping the Law, but entirely upon God's grace and mercy to forgive sins. But you can never fulfil positive commands, like the open-ended obligation to love. You can't say, okay, I've loved God and my neighbour now, that's it, done. Tick that one off.
Love is the opposite of legalism.
Love is a God centred, other person centred, outward looking activity. Legalism is self-centred concern for keeping the rules so as not to make yourself impure, even if at the expense of others. Legalism is the opposite of Love. It promotes both spiritual laziness and fear. Spiritual laziness, because it makes you content with mere ritual.