According to ehow.com,
"As a cut flower, tulips have the distinctive characteristic of continuing to grow in the vase and stretch toward a dominant source of light. This trait can cause a carefully arranged floral bouquet to disassemble itself into something quite different as the stems may extend by as much as 2 inches, causing the blossom heads to droop. The flowers also open wide in bright light, sometimes exaggerating the drooping effect, although they usually close again at night if the room temperature is moderate to cool."
Much like a tulip, I tend to grow and stretch toward my source of light (God) when I'm cut (wounded). While I'm prone to self-examination even when all is well, I find that I tend to dig deeper when I'm "enduring" life's pruning process. And, sometimes, during that process, my countenance changes and my head and shoulders droop from the weight of the circumstances. But before too long, I start to see a bright light and open myself to the lesson. Although my head and shoulders may still droop, as I get stronger the temperature of the lesson begins to moderate and cool down. Gradually, the wound begins to close, I regain my composure and begin to stand tall again. Tulips (and trees)
. . . so reminiscent of my life.