Devotion should not be confined to the four walls of the shrine-room, or the few minutes you perform meditation (Dhyana). It is a full time spiritual practice (Sadhana). Your devotion has to be expressed as worship of every living being as a living embodiment of Divinity. See God in every one, even in persons whom you regard as your enemies. Practise that broad and inclusive type of Love. How can you derive happiness by showing love and reverence to a stone idol that does not respond or reflect the feelings? Living beings will return appreciation and gratitude and wish you well. You can see joy growing in their faces. That will confer satisfaction on you. If you cannot educate yourself to love your fellow man, how can you follow the path of dedication to God?