Deuteronomy 6:5 Love the LORD your God with all your heart and with all your soul and with all your strength.
The first, and greatest commandment is that we love the Lord our God with everything we are and everything we have.
To many, this may be a tall order as they struggle to love the people around them or even themselves; which is why Jesus related the love for each other as being as important.
We tend to measure our love for others in one way or another. What God is saying is we should not try to measure it or even think it through – just simply love Him with everything!