If one doesn't practice remembering Krishna while one is struggling for existence, then it will not be possible for one to remember Krishna at the time of death.
Hearing is important but practical application is the most important. Then it will be possible to remember the Lord constantly.
Life should be moulded in such a way so that we can be able to remember the Lord constantly.
Remembrance of Krishna is not possible for the impure soul who has not practiced Krishna consciousness in devotional service. Therefore, one should practice Krishna consciousness from the very beginning of life. If one wants to achieve success at the end of his life, the process of remembering Krishna is essential. Therefore, one should constantly and incessantly chant the Hare Krishna Maha Mantra.
If your car is moving, don’t forget whose push started it to get it going. Similarly, always remember the different gurus that got you moving on the path of devotion.