What is a carefully kept secret within the Lunar Templars is their understanding of the nature of the Tears of Selune. These are not merely refuges where Selune's mercy saved lands in the moments of destruction, these are truly battle ground between good and evil itself. Shar's hand will not relent in her desire to see the lands destroyed, ever she strives through her most powerful servants to spread hopelessness and despair, to turn the Tears to Evil, even if she cannot destroy them by her preference.
The Lunar Templars are the bastion, they recognize that almost every event, even something minor, is part of a wider conflict. Spreading hope, keeping the light alive, all acts of goodness, mercy, or if necessary violence against the dark must be championed or the Tears they are upon shall fall to corruption forever.
The reason the Lunar Templars have come to Arabel is not merely to protect it, but because they lost the last Tear upon which they were headquartered and fear the same fate for Arabel. But only the Templars, or their most trusted allies who come before its leaders and swear to keep their secrets, can be told just how close catastrophe is - the Templars do not wish to cause a wide spread panic as this would only help Shar.