Empty-handed I go; and behold, the spade is in my hands;
I walk on foot, and yet on the back of an ox I am riding;
When I pass over the bridge,
Lo, the water floweth not, but the bridge doth flow.
This is the gatha of Jenye, as found in An Introduction to Zen Buddhism by Daisetz Teitarō Suzuki. It is followed by an explanation into the illogical nature of Zen, that I don't care to remember right now.
What's important for me: after I understood these words, the nature of my meditation changed.
In a completely unrelated subject:
You can be happy at any time you like, but you might have to work at it.