Ye are the light of the world. A city that is set on an hill cannot be hidden. -Matt 5:14 (KJV)
Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. -Matt 22:37 (KJV)
You need both.
Without a corporate relationship through the people of God you have no accountability...
Without the personal closeness with Christ.. life would not be full of the joys of the Lover.
Even in the scriptures Christ talks to both the corporate and the individual person.