"Tis not seasonable to call a man traitor, that has an army at his heels"

This quote by John Selden is a suggestion that it is not wise to identify someone a traitor without considering the effects. Selden is suggesting that it is not a good idea to accuse somebody of treason when they have a large following or an army at their back. This implies that the accused person has the power to retaliate and cause damage to those who have implicated them. Selden is warning that it is not smart to make such allegations without thinking about the possible repercussions. He is likewise suggesting that it is essential to believe carefully before making such allegations and to consider the possible repercussions. This quote is a pointer that it is important to believe prior to speaking and to think about the potential effects of our words.