Mere philosophy will not satisfy us. We cannot reach the goal by mere words alone. Without practice, nothing can be achieved. (3)
There’s no value in digging shallow wells in a hundred places. Decide on one place and dig deep. Even if you encounter a rock, use dynamite and keep going down. If you leave that to dig another well, all the first effort is wasted and there is no proof you won’t hit rock again. (52)