Shaping multiple lines of text into objects

GDm,

You may:

1) Create the shape of the knife (presumably you have done this already), and copy it if you wish to keep the actual visible path;

2) Select the Area Type Tool (flyout at ClickHold on the Type Tool), click somewhere on the (outer) path of the knife shape (copy), and simply start typing; you may adjust size in the Character palette/panel for best fit.

This is for simple constant size. Adapted size/shape takes more effort.