What do you mean by sentiment?
In Matthew 22:37-40, Jesus teaches "Love the Lord your God with all your heart and with all your soul and with all your mind. This is the first and greatest commandment. And the second is like it: Love your neighbor as yourself. All the Law and the Prophets hang on these two commandments.
So how do you explain Jesus including the second greatest commandment wit the first - loving our neighbors as ourselves?
I understand that your criteria for loving God "with all your heart and with all your soul and with all your mind" is based on the condition of "surrendering oneself with no attempt to find oneself worthy of any good." Funny Jesus didn't mention self-abasement in His description. And I am absolutely positive that my love for God doesn't measure up to your requirements - my only, constant prayer is that somehow, someway, God accepts the feebleness and cowardice of my love for Him as adequate, and doesn't hold me to your exalted, perfect standards.
But what about the other part? What part does self-abasement play in loving our neighbor as ourselves? Is that "just" sentiment? Is it trivial? Jesus plainly did not portray it as trivial. He said "ALL the law and the prophets hang on these TWO commandments." So according to your requirements, how is that to be done, how are we to love one another and not make it merely "sentimental"?
Jesus taught we must die to ourselves to be reborn in Him. The flesh must be mortified for the soul to flourish. Feeble is not enough for in your feeble interests you still pride yourself on your own abilities. No ability will suffice. Nothing you can do can make you worthy of God’s love.
We are, each of us, sinners, condemned by our sin however paltry. We are saved only by the sacrifice of Christ who died as atonement for our sin. It is in His death and His resurrection that we have any hope.
Do not pray that somehow God will find you worthy. He can not. We are all sinners in the hands of a God who cannot abide sin. Only through surrendering our will and our lives to Christ can we be saved from our sin. He loved us so much He sent His only Son to be a sacrifice for us. That is the love of God.