Karma – the Path of Selfless Service – requires us to love all and serve all with the Narayana Bhav. Have the Bhavana that “I am only the instrument in Shanmukha’s Hands and my reward is in the mere fact that I am being used by Him in His Leela”.
Also the “other” for whom the seva is being done is also the Temple of Guha and so, “whatever is my seva is Guharpanam.” Here also the Karmayogi, even while living amidst life’s transactions, comes to feel and yearn for Him, the Divine Lord of all. Work is worship.