While there are many generic paths to God, the path of Guru’s Grace (Gurukrupāyoga) is the most important from the point of view of achieving the ultimate in spiritual evolution. In every aspect of life, it is best if we have a guide or a teacher to help us understand, learn and progress. Making spiritual progress is no exception to this Universal rule and it is only by the grace of the eternal Guru Principle (the Teaching Principle of God) acting through a Guru in human form, that a devotee makes rapid spiritual progress.
No matter what spiritual path we are on, if we try and do it on our own, we can reach only up to a particular spiritual level. Beyond this, Guru’s grace is an absolute necessity to take us to the next level.