Carbon Fields add variables to rich text

Question

I try to get variable in my rich text

Field::make('rich_text', 'contact_plugin_message1', __('Bericht bevesteging klant'))
$werknemeremail = $_POST['werknemeremail'];
$message     = get_plugin_options("contact_plugin_message1");

Html i insert in the inputbox:

  <h1>kjkjkj</h1>
    <h2>{{{$field_waarde2}}}</h2>