Service to humanity is service to God!
Compilations, Quickeners of Mankind
Baha’is believe there are many ways to service or worship God. Service to humanity can take many forms. As many of you know, I am in favor of volunteering and helping your neighbors (whether they are the people next door, across town, state, country, or even across the ocean). Every little deed is something that makes peoples lives happier and easier.
From the Paris Peace Talks of 1912 you can see how Abdu'l-Baha, the son of Bahá'u'lláh and Baha’is look at service to humanity:
”Oh, friends of God! If ye will trust in the Word of God and be strong; if ye will follow the precepts of Bahá'u'lláh to tend the sick, raise the fallen, care for the poor and needy, give shelter to the destitute, protect the oppressed, comfort the sorrowful and love the world of humanity with all your hearts, then I say unto you that ere long this meeting-place will see a wonderful harvest. Day by day each member will advance and become more and more spiritual. But ye must have a firm foundation and your aims and ambitions must be clearly understood by each member. They shall be as follows:
1. To show compassion and goodwill to all mankind.
2. To render service to humanity.
3. To endeavour to guide and enlighten those in darkness.
4. To be kind to everyone, and show forth affection to every living soul.
5. To be humble in your attitude towards God, to be constant in prayer to Him, so as to grow daily nearer to God.
6. To be so faithful and sincere in all your actions that every member may be known as embodying the qualities of honesty, love, faith, kindness, generosity, and courage. To be detached from all that is not God, attracted by the Heavenly Breath -- a divine soul; so that the world may know that a Bahá'í is a perfect being.
Strive to attain this at these meetings. Then, indeed and in truth will ye, the friends of God, come together with great joy! Render help one to the other, become as one man, having reached perfect unity.
I pray to God that daily ye may advance in spirituality, that God's love may be more and more manifested in you, that the thoughts of your hearts may be purified, and that your faces may be ever turned towards Him. May you one and all approach to the threshold of unity, and enter into the Kingdom. May each of you be like unto a flaming torch, lighted and burning bright with the fire of the Love of God.”
”Briefly, all effort and exertion put forth by man from the fullness of his heart is worship, if it is prompted by the highest motives and the will to do service to humanity. This is worship: to serve mankind and to minister to the needs of the people. Service is prayer.”
Abdu'l-Baha also states in other writings:
”What bounty greater than this that science should be considered as an act of worship and art as service to the Kingdom of God”.
”My highest wish and desire is that ye who are my children may be educated according to the teachings of Bahá'u'lláh and may receive a Bahá'í training; that ye may each become a lighted candle in the world of humanity, may be devoted to the service of all mankind, may give up your rest and comfort, so that ye may become the cause of the tranquillity of the world of creation.”
”In the Bahá'í Cause arts, sciences and all crafts are (counted as) worship Briefly, all effort and exertion put forth by man from the fullness of his heart is worship, if it is prompted by the highest motives and the will to do service to humanity. This is worship: to serve mankind and to minister to the needs of the people. Service is prayer.”
”Work done in the spirit of service is worship.”
So you can see, that you can be a service humanity in a number of ways: a job well done, by arts and sciences, volunteering, or simple good deeds.
Can you think of a way to send a prayer to God by doing service for humanity?

