This the third golden key: to love God. How do you love God? To love God who is invisible.
Love him by trust. Did you realise that every time you are at your wit’s end, and all you can do is pray and trust him, that that is an act of love? So love him that way. Love him by reflection. Think of all your blessings, all the answers to prayer you receive, and all his goodness. Love him by sacrifice. Every time you make a sacrifice for the Lord, you express love for him. It is what sacrifices is. Love him by all these things.