Letters from a Stoic 22 : 2

We can formulate general rules and commit them to writing, as to what is usually done, or ought to be done; such advice may be given, not only to our absent friends, but also to succeeding generations. In regard, however, to that second question, – when or how your plan is to be carried out, – no one will advise at long range; we must take counsel in the presence of the actual situation.