The simple white text on black background read, "A lion doesn't concern himself with the opinions of a sheep."
Per Marca, the judge believes there is "enough evidence" to suggest Messi "might have known and permitted the creation and maintenance of a fictitious business network that had as its aim the avoiding of tax obligations derived from image rights business activities."
This is odd, given the timing. If Messi is referring to the legal charges against him, it comes across as rather dismissive, especially considering the seriousness of the allegations.
Interestingly enough, the NFL's Richard Sherman tweeted the same quote in response to the backlash following his post-NFC Championship Game rant in January:
A lion doesn't concern himself with the opinions of a sheep.— Richard Sherman (@RSherman_25) January 20, 2014
We'll see if Messi provides an explanation at some point or if the post even stays up.