"Conscience has no more to do with gallantry than it has with politics"

This quote by Richard Brinsley Sheridan is suggesting that conscience has absolutely nothing to do with either gallantry or politics. In other words, one's conscience must not be an aspect when making decisions in either of these areas. This implies that gallantry and politics must be based upon other aspects, such as logic, reason, and personal choice. Sheridan is suggesting that conscience ought to not be a factor in decision-making in either of these areas, as it is not relevant to the situation. He is indicating that decisions need to be made based on what is best for the situation, not on what one's conscience dictates. This quote is a pointer that choices ought to be made based on what is best for the scenario, not on what one's conscience dictates.