Give your seat up on the bus or subway

So, it was really a tiring day after college. I was traveling back home. An old man climbed the bus when I was seated. I was really tired and tried to ignore the old man and later as I was ignoring him I was watching out of the window. I saw a quote on a huge wall which says " you will always repent what you ignore." So I just got up from my seat and asked the old man to be seated.