What does Thoreau try to do at all times? What is the significance of the present moment and why is meditation so focused on “being in the present”? Why does Thoreau find it difficult to explain and share these ideas even though he would like to? "Walden pg. 21 - The Present Moment"

“In any weather, at any hour of the day or night, I have been anxious to improve the nick of time, and notch it on my stick too; to stand on the meeting of two eternities, the past and future, which is precisely the present moment; to toe that line. You will pardon some obscurities, for there are more secrets in my trade than in most men’s, and yet not voluntarily kept, but inseparable from its very nature. I would gladly tell all that I know about it, and never paint “No Admittance” on my gate”

What does Thoreau try to do at all times? What is the significance of the present moment and why is meditation so focused on “being in the present”? Why does Thoreau find it difficult to explain and share these ideas even though he would like to?