Concentration and Meditation
As a yogi you should work harder than others, and for that you need good concentration.
For a yogi, concentration is a weapon for fighting the obstacles that detract from spiritual life. Concentration is the key for opening the door of your inner treasury. If you sit in meditation and your mind is swarming with thoughts, it means that you cannot concentrate, let alone meditate.
And it is only through concentration that the chakras can be awakened. So the spirit of the yogi becomes one with eternal joy and happiness. That is when your concentration ends and meditation begins.