Wishing all of you a happy Thanksgiving Day. May God bless you always!
“Labor to acquire thanksgiving toward God for everything, and the power of the Most High will overshadow you, and then you will find peace.” (Sts. Barsanuphius & John, Guidance Toward Spiritual Life, pg. 94)
“O benevolent and beneficient God: When you sent the Word of truth and the sanctifying Spirit into this world, you revealed the great mystery of your godhead. So now, on this, the beginning of another Thanksgiving holiday, and as the darkness of night overtakes us, teach us how to be truly grateful for all we have been given. Let the brilliance of your divine light illumine our lives and lead us to know, love, and serve you in the Spirit and the Truth of Christ. For you are indeed our God, and we give you glory, three divine persons, eternal in glory, one God, incomparable in majesty: now and forever, and unto ages of ages. Amen.” (From New Skete’s Thanksgiving Vespers)
See also: Thanksgiving Prayers of Hippolytus, The Mystery of Thanksgiving on Behalf of All Things and For All Things, Thanksgiving is Prayer, Strangers & Neighbors: Christian Thoughts on Thanksgiving (1989), Thanksgiving (2009), Thanksgiving Day (2008) , Thanksgiving Meditation and Prayers, Thanksgiving Bears Fruit in the Giving
Thanks be to God!