That depends on who "you" are, and what the purpose of the communication is. Assuming the highest level of security and If the recipient has a pgp key and I want to be assured the message is not lying around after its delivered; I would send a tor link to a one-use "burn after reading" (like from start9) message with a strong password that I provided in-person. I would also be sure the recipient is reading the message on a relatively secure computer. In addition i would assume any computer connected to the internet is compromized and the message itself should be limited such that the message is ambiguous and contains primarily references to phrases and ideas that only the two of us understand.