In plain words
A man may learn every branch of learning and win over the assembly; he may be a hero and fight in battle; he may be born a king of kings and rule a kingdom; he may give gifts of gold and cows; he may count the stars that are in the sky; he may tell the names of every kind of living being; he may study the eight-limbed sciences; he may even reach the sphere of the moon; but curbing the body and the senses, at any time, holding the mind still and turning it within, he cannot stand firm, his citta in unmoving samādhi.
Students!
The body has power over the senses. The senses have still more power over the body. The senses cannot exist apart from the body, nor the body apart from the senses. The two are bound together inseparably, each the support of the other. Just as negative without positive, or positive without negative, is of no use, so the body without the senses, or the senses without the body, is equally of no use. So nourishing the body in the proper way is every person's duty.
Here the nature of the senses is utterly wonderful. Though divinity is a great wonder of wonders, the nature of the senses, what the senses experience and what the senses do are more wonderful still.
Wondrous, and for the three worlds wondrous; sickles to the creeper of worldly life; true friends; to the forest of the wise the springtime: such are the doings of the senses.