When something can be done according to reason — the same reason that gods and humans share — there is no good reason to grieve or worry. When you can gain the fruit of an action that was started well and carried out according to human nature, or when success is certain, it makes no sense to fear damage. Everywhere and always, you have the power to accept whatever God has given you with reverence. You can deal justly with the people you encounter. You can carefully examine every thought that comes to mind, so nothing slips past before you truly understand what it is.
Where the matter may be effected agreeably to that reason, which both unto the Gods and men is common, there can be no just cause of grief or sorrow. For where the fruit and benefit of an action well begun and prosecuted according to the proper constitution of man may be reaped and obtained, or is sure and certain, it is against reason that any damage should there be suspected. In all places, and at all times, it is in thy power religiously to embrace whatsoever by God's appointment is happened unto thee, and justly to converse with those men, whom thou hast to do with, and accurately to examine every fancy that presents itself, that nothing may slip and steal in, before thou hast rightly apprehended the true nature of it.