"Now is the time for yoga," is the first of the yoga sutras (teachings of yoga by Patanjali) and says so much about yoga and life. Now is the only time for anything really. It's always now but we get confused and obsessed by the past and the future, but really it's all just now. (Listen to Oprah and Eckart if you want to hear more about it.)
Another way to consider it is, "now that you've finally realized your way of doing it isn't working, it's time for yoga." Like you can't do yoga when your big ego is in the way or is guiding you. When you approach yoga with a state of mind that is curious and anticipatory, you're more open and receptive and can get on with the job. When you think you know everything, yoga's not going to happen.
But seriously, now is the time for yoga. I've got to get dressed and ready for a full day of yoga teaching. So now really is the time for yoga and I'd better hurry up!