As we all age we see how challenging it is to continue to practice in such a way that our bodies and minds stay truly strong, fit and supple. Other priorites come along to replace the fire, zeal, and devotion we have for practice.
To practice Isvara pranidhana is to endeavor to live your life from the perspective that everything under the sun shares a benevolent, invisible, cohesive, inescapable connection with everything else.
'Nothingness merged with nothingness', the zero position, Samastitihi this is where IT happens, where I befriend you, the mind horse, I get control of the reins that direct you and the ungraspable becomes graspable.
One of yoga's GREAT gifts is to show you your limits, To show you that despite thinking you are giving everything you have to give it is not enough.