“The zeal of Thine house hath eaten me up.” – Psalms 69:9
This scripture is referenced, by the apostles, in the account contained in John 2 where Christ chased out the moneychangers from the temple. When the apostles saw Jesus chase them out with such emotion, they were left few words to say, but “the zeal of Thine house hath eaten me up.”
The question remains: how does this play out in our lives? As one of my friends likes to say, the importance of this passage is in its application. The following comes from Paramahansa Yogananda and can be found in the first volume of his work, The Second Coming of Christ: The Resurrection of the Christ Within You
“The subjective admonition to be drawn from this action of Jesus in the temple is that the sincere worshiper of God must reverentially observe the law of devoted concentration. To give superficial attention to one’s prayers, while entertaining in the background of the mind thoughts of one’s life enterprises – getting and having, planning and doing – is to take the name of God in vain. The manifesting power of concentration comes from centering the mind upon one thing at a time. “Buying and selling” – the unending “busy-ness” of material life – should be carried on in the marketplace of one’s duties; whereas it is distractingly intrusive in the temple of prayer – just as an altar and preaching in a shop would be an unwelcome imposition on the legitimate conduct of commerce. Halfhearted, unconcentrated mental rambling during the time of prayer brings neither a response from God nor the focused power of attention necessary for material success.
“Though God tries to respond to the earnest prayers of His children, His voice resonating in intuition-felt peace is wholly distorted by restlessness-producing transactions between the senses and the outer world, and by the aroused attention-demanding associated thoughts. The Lord recedes humbly into a remote silence when the temple of His devotee’s concentration becomes a noisy marketplace desecrated by these mercenaries of material consciousness. Soul intuition – the inner Christlike preceptor and guide of man’s sublime thoughts and feelings – must come and wield with will power the whip of spiritual discipline and self-control to drive out the intruders. Repeated practice of scientific techniques of meditation fully concentrates the attention within, blessing the temple of inner communion with a tranquil surcease of sensory commerce. The devotee’s consciousness is thereby restored to a sanctuary of silence, wherein alone is possible true worship of God.
 Meditation – concentration upon God – is the portal through which every seeker of every faith must pass in order to contact God. Withdrawal of the consciousness from the world and the senses for the purpose of communing with God was taught by Christ in these words: “But thou, when thou prayest, enter into thy closet [draw the mind within], and when thou hast shut thy door [the door of the body and senses], pray to thy Father which is in secret [within you]” (Matthew 6:6; see Discourse 28).