One of two things will happen when you socialize with others. You either become like your companions, or you bring them over to your own ways. Just as when a dead coal contacts a live one, either the first will extinguish the last, or the last kindle the first. Great is the danger; so be circumspect on entering into personal associations, even and especially light-hearted ones.
Most of us do not possess sufficiently developed steadfastness to steer our companions to our own purpose, so we end up being carried along by the crowd. Our own values and ideals become fuzzy and tainted; our resolve is destabilized.