This perfect weight tee has the image of a royal seal. This seal has half the face of a lion and half a lamb. This imagery symbolises Revelation 5, when John turns to look, expecting a Lion as the elder described, but instead he sees a slaughtered lamb. The crown of thorns brings us to Jesus on the cross. The Lamb of God is the only one worthy of opening the sealed scroll. This lamb was worthy of worship. The inscription around the crown of thorns is from both Rev 5 and 7. These were the words proclaimed by those who worshiped the Lamb. 
May we remember that we are sealed by the Holy Spirit, by the blood of the lamb and can rest in God's grace, living freely to love others and be gracious to all, in the hope that they may receive the Holy Spirit and also sing a new song.  
"In him you also were sealed with the promised Holy Spirit when you heard the word of truth, the gospel of your salvation, and when you believed."
Ephesians 1:13
 
"Then one of the elders said to me, “Do not weep! See, the Lion of the tribe of Judah, the Root of David, has triumphed. He is able to open the scroll and its seven seals. ”Then I saw a Lamb, looking as if it had been slain, standing at the center of the throne, encircled by the four living creatures and the elders. The Lamb had seven horns and seven eyes, which are the seven spirits of God sent out into all the earth. He went and took the scroll from the right hand of him who sat on the throne. And when he had taken it, the four living creatures and the twenty-four elders fell down before the Lamb. Each one had a harp, and they were holding golden bowls full of incense, which are the prayers of God’s people. And they sang a new song, saying:
“You are worthy to take the scroll
    and to open its seals,
because you were slain,
    and with your blood you purchased for God
    persons from every tribe and language and people and nation.
10 You have made them to be a kingdom and priests to serve our God,
    and they will reign[b] on the earth.”
Then I looked and heard the voice of many angels, numbering thousands upon thousands, and ten thousand times ten thousand. They encircled the throne and the living creatures and the elders. In a loud voice they were saying:
“Worthy is the Lamb, who was slain,
    to receive power and wealth and wisdom and strength
    and honor and glory and praise!”
Then I heard every creature in heaven and on earth and under the earth and on the sea, and all that is in them, saying:
“To him who sits on the throne and to the Lamb
    be praise and honor and glory and power,
for ever and ever!”
The four living creatures said, “Amen,” and the elders fell down and worshiped."
Revelation 5:5-14 
 
 
“Do not harm the land or the sea or the trees until we put a seal on the foreheads of the servants of our God.” 
Revelation 7:3 
 
After this I looked, and there before me was a great multitude that no one could count, from every nation, tribe, people and language, standing before the throne and before the Lamb. They were wearing white robes and were holding palm branches in their hands. 10 And they cried out in a loud voice:
“Salvation belongs to our God,
who sits on the throne,
and to the Lamb.”
11 All the angels were standing around the throne and around the elders and the four living creatures. They fell down on their faces before the throne and worshiped God, 12 saying:
“Amen!
Praise and glory
and wisdom and thanks and honor
and power and strength
be to our God for ever and ever.
Amen!”
Revelation 7:9-12