As American workers return to their place of business, following a long holiday weekend, they can reflect on some of the words of Abdu'l-Baha. Here is a passage taken from a talk that Abdu'l-Baha gave on June 6, 1912:
"Praise be to God! You have heard the call of the Kingdom. Your eyes are opened; you have turned to God. Your purpose is the good pleasure of God, the understanding of the mysteries of the heart and investigation of the realities. Day and night you must strive that you may attain to the significances of the heavenly Kingdom, perceive the signs of Divinity, acquire certainty of knowledge and realize that this world has a Creator, a Vivifier, a Provider, an Architect—knowing this through proofs and evidences and not through susceptibilities, nay, rather, through decisive arguments and real vision—that is to say, visualizing it as clearly as the outer eye beholds the sun. In this way may you behold the presence of God and attain to the knowledge of the holy, divine Manifestations.
You must come into the knowledge of the divine Manifestations and Their teachings through proofs and evidences. You must unseal the mysteries of the supreme Kingdom and become capable of discovering the inner realities of things. Then shall you be the manifestations of the mercy of God and true believers, firm and steadfast in the Cause of God.
Praise be to God! The door of divine knowledge has been opened by Bahá’u’lláh, for He has laid the foundation whereby man may become acquainted with the verities of heaven and earth and has bestowed the utmost confirmation in this day. He is our Teacher and Adviser; He is our Seer and the One clement toward us. He has prepared His gifts and vouchsafed His bounties, revealed every admonition and behest, prepared for us the means of eternal glory, breathed upon us the life-quickening breaths of the Holy Spirit, opened before our faces the doors of the paradise of Abhá and caused the lights of the Sun of Truth to shine upon us. The clouds of mercy have poured down their precious rain. The sea of favor is swelling and surging toward us.
The spiritual springtime has come. Infinite bounties and graces have appeared. What bestowal is greater than this? We must appreciate the divine generosity and act in accordance with the teachings of Bahá’u’lláh so that all good may be stored up for us and in both worlds we shall become precious and acceptable to God, attain to everlasting blessings, taste the delicacy of the love of God, find the sweetness of the knowledge of God, perceive the heavenly bestowal and witness the power of the Holy Spirit.
This is my advice, and this is my admonition."
The above passage can be found in the book The Promulgation of Universal Peace.