We grow complacent or even cynical. Even when we try to go beyond everyday neuroses, our spiritual seeking generates pathologies of its own. We need the feedback and prodding from philosophical mentors to inspire us to deal with the challenges of life constructively, to make the best of our opportunities while incarnated here. Meditation and philosophy are complementary to each other. Meditation anchors and deepens self-inquiry.
Philosophical inquiry keeps meditation from becoming an escapist routine.
The combined practice helps bring integrated functioning to one's left and right brain. Both require guidance, however. Guidance doesn't replace self-effort and responsibility. Finding one's dynamic balance is key to success in living the good life. I have over thirty years experience with meditation and related disciplines.