diff --git a/jsonschema/validators.py b/jsonschema/validators.py
index 1dc420c70..7090f73da 100644
--- a/jsonschema/validators.py
+++ b/jsonschema/validators.py
@@ -326,7 +326,6 @@ def iter_errors(self, instance, _schema=None):
 
                     errors = validator(self, v, instance, _schema) or ()
                     for error in errors:
-                        # set details if not already set by the called fn
                         error._set(
                             validator=k,
                             validator_value=v,
@@ -349,8 +348,15 @@ def descend(self, instance, schema, path=None, schema_path=None):
                 yield error
 
         def validate(self, *args, **kwargs):
-            for error in self.iter_errors(*args, **kwargs):
-                raise error
+            errors = self.iter_errors(*args, **kwargs)
+            matched_errors = exceptions.best_match(errors)
+            error_dict = {}
+            error_message = None
+            if matched_errors:
+                error_dict['key'] = list(matched_errors.path)[-1]
+                error_dict['message'] = matched_errors.message
+                error_message = "Schema Error! " + str(error_dict)
+            return error_message
 
         def is_type(self, instance, type):
             try: