extensive; they will more than pay you for your trouble.  I do not regret the time that I passed in pleasures; they were seasonable; they were the pleasures of youth, and I enjoyed them while young.  If I had not, I should probably have overvalued them now, as we are very apt to do what we do not know; but, knowing them as I do, I know their real value, and how much they are generally overrated.  Nor do I regret the time that I have passed in business, for the same reason; those who see only the outside of it, imagine it has hidden charms, which they pant after; and nothing but acquaintance can undeceive them.  I, who have been behind the scenes, both of pleasure and business, and have seen all the springs and pullies of those decorations which astonish and dazzle the audience, retire, not only without regret, but with contentment and satisfaction.  But what I do, and ever shall regret, is the time which, while young, I lost in mere idleness, and in doing nothing.  This is the common effect of the inconsideracy of youth, against which I beg you will be most carefully upon your guard.  The value of moments, when cast up, is immense, if well employed; if thrown away, their loss is irrecoverable.  Every moment may be put to some use, and that with much more pleasure, than if unemployed.  Do not imagine, that by the employment of time, I mean an uninterrupted application to serious studies.  No; pleasures are, at proper times, both as necessary and as useful; they fashion and form you for the world; they teach you characters, and show you the human heart in its unguarded minutes.  But then remember to make that use of them.  I have known many people, from laziness of mind, go through both pleasure and business with equal inattention; neither enjoying the one, nor doing the other; thinking themselves men of pleasure, because they were mingled with those who were, and men of business, because they had business to do, though they did not do it.  Whatever you do, do it to the purpose; do it thoroughly, not superficially.  ‘Approfondissez’:  go to the bottom of things.  Any thing half done or half known, is, in my mind, neither done nor known at all.  Nay worse, it often misleads.  There is hardly any place or any company, where you may not gain knowledge, if you please; almost everybody knows some one thing, and is glad to talk upon that one thing.  Seek and you will find, in this world as well as in the next.  See everything; inquire into everything; and you may excuse your curiosity, and the questions you ask which otherwise might be thought impertinent, by your manner of asking them; for most things depend a great deal upon the manner.  As, for example, I am afraid that I am very troublesome with my questions; but nobody can inform me so well as you; or something of that kind.