When I have the time ...

Still on Avot 2:5, Hillel's final teaching is "Don't say 'when I'm free I will learn, because perhaps you will never have the time". 

There are times in many people’s lives when their physical and mental resources are stretched to the point that meaningful Torah learning is impossible. The Torah sages are right to say that it should always be possible to make time to learn and that each moment that passes can never be reclaimed. However, in earlier generations and to a great extent in our own, those who teach this message have the privilege of being in full-time learning or Torah teaching themselves, with wives who were supportive to the point of unselfishly and unstintingly sacrificing their strength and any personal aspirations in order to enable their rabbinical husbands to fulfil their Torah commitments to the maximum possible. 

This level of commitment to learning is often impossible for a modern family man to attain, despite his wish to do so. Two or three daily visits to his synagogue to pray,  an hour’s commuting to work and the same again to return home, the best part of the day spent working for a living, taking children to school a couple of mornings a week, helping at home as a dutiful husband and father—all these things can leave a man with little time and peace of mind to address his duty to learn Torah. It is not unreasonable for such a person to say “when I’m free to learn, I shall do so.” The big problem for him, though, is to recognize the point at which he has to stop saying it. Otherwise, once he has settled into his no-learning routine in order to feed, clothe, educate and marry off his children, pay off his mortgage and put himself on a secure financial footing, he will simply start over and do the same thing for the next generation and will never get round to learning at all.